Effective decoupling of ferromagnetic sublattices by frustration in Heusler alloys

Cugini, F.; Chicco, Simone; Orlandi, Fabio; Allodi, G.; Bonfà, Pietro; Vezzoni, V.; Мирошкина, О. Н.; Gruner, Markus E.; Righi, Lara; Fabbrici, S.; Albertini, F.; Renzi, R. De; Solzi, M.

doi:10.1103/physrevb.105.174434

Cited by 12 publications

(3 citation statements)

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“…In this research, the samples recorded increases in SQR (Mr/Ms) as a function of the temperature range (from 0.131 at 100 K to 2.242 at 300 K). Although the temperature range was more restricted in the present research, the variation of magnetic susceptibility is small (Cugini et al, 2022); hence, the susceptibility analysis was conducted using the following Equation 1:…”

Section: Resultsmentioning

confidence: 99%

A Study of the Magnetic Properties and Structure of Heusler Alloys Prepared by Arc-Melting Technique

Khalefa

2024

Sci. Technol. Indones

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Heusler alloys were prepared in this study using the Arc-Melting method in which 30 g of the Arc-melting pure elements were combusted in an Argon arc furnace. Saturation magnetization, X-ray diffraction (XRD) analysis, and scanning electron microscope (SEM) were used to characterize the prepared alloys in terms of the compositions (Co2TiZ), where Z= Al, Ge, Sb are related IVB sub-group metals. In this work, the specimens containing Ge and Ti have fully Ferro magnetically order and L21 chemical structure with magnetism due to the magnetic moments attributed to the Co site. The Heusler alloys containing IIB or IVB sub-group metals such as Al, Ti, or Ge behave ferromagnetism, with the magnetic moments being attributed to the magnetic moments of the Co sites. Heusler alloys containing the group IVB element such as Sb exhibited vacant chemical effects with Co sites, and they also contain some paramagnetic compounds. Heusler alloys with Sb element exhibited paramagnetic behavior with vacant chemical order. Alloys demonstrate different magnetic properties as a result of temperature change and exchange interaction with atomic structure.

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Section: Resultsmentioning

confidence: 99%

A Study of the Magnetic Properties and Structure of Heusler Alloys Prepared by Arc-Melting Technique

Khalefa

2024

Sci. Technol. Indones

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“…The magnetic behavior of the nickel atoms is coupled with the dominant effect. [21,22] However, magnetic effects are not the sole remarkable aspects of this type of alloy. For example, reports highlight the presence of giant elastocaloric effects in Ni-Mn-In [23,24] and Ni-Mn-Sn [25] alloys.…”

Section: Introductionmentioning

confidence: 99%

Half‐Metallicity in Ni₂XMn Heusler Alloys (X = Fe, Co, Cr): Ab Initio Calculations

Alés

2023

Physica Status Solidi (b)

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Ab‐initio calculations have been conducted on all‐d light transition metals featuring Full and Inverse Heusler structures with the composition Ni2XMn, where X=Fe,Co,Cr. The analysis encompasses lattice parameters, bulk modulus, and formation energy, which are thoroughly examined across various magnetic orders. Additionally, the equilibrium structures are comprehensively characterized. Elastic constants are calculated and mechanical stability is thoroughly discussed. Furthermore, tetragonal distortions, following the Bain path, are computed, and a novel stable structure is introduced. Spin‐resolved density of electronic states and band structures are scrutinized in detail. The findings reveal a behavior consistent with half‐metallicity, even though the gaps between the conduction and valence bands are exceedingly small.This article is protected by copyright. All rights reserved.

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“…[8,9] Their flexible lattice allows us to explore a wide range of chemical compositions and to tune their structural, magnetic, and functional properties. [29][30][31][32] By varying the composition, both a standard MCE, associated with the ferro-to-paramagnetic transition of the austenitic phase, and a giant MCE, related to the martensitic magneto-structural transition [28,33] can be obtained near room temperature. The high tunability of their MC properties, together with the high thermal conductivity and the absence of rare earths, make these alloys very promising for thermomagnetic applications.…”

Section: Introductionmentioning

confidence: 99%

Graphene‐Based Magnetocaloric Composites for Energy Conversion

et al. 2022

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Herein, a simple, versatile, and cost‐effective method to fabricate innovative thermal conductive magnetocaloric (MC) composites, which offers a smart solution to manufacture active elements with desired geometries, overcoming the current thermal and mechanical limits of the most studied MC materials, is presented. The composite is prepared by embedding powder of a MC material in an epoxy matrix enriched with a graphene‐based material, obtained by thermal exfoliation of graphite oxide. The graphene‐enriched composite shows a significant improvement of the MC time response to the magnetic field, due to the formation of a 3D network that bridges the MC particles and reduces the metal–matrix contact resistance, thus creating a percolation path for an efficient heat transfer. Because of the simplicity and scalability of the preparation method and the great enhancement in response time, these new functional composites represent an important step for the effective application of MC materials in thermomagnetic devices for the energy conversion.

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Effective decoupling of ferromagnetic sublattices by frustration in Heusler alloys

Cited by 12 publications

References 50 publications

A Study of the Magnetic Properties and Structure of Heusler Alloys Prepared by Arc-Melting Technique

A Study of the Magnetic Properties and Structure of Heusler Alloys Prepared by Arc-Melting Technique

Half‐Metallicity in Ni₂XMn Heusler Alloys (X = Fe, Co, Cr): Ab Initio Calculations

Graphene‐Based Magnetocaloric Composites for Energy Conversion

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Effective decoupling of ferromagnetic sublattices by frustration in Heusler alloys

Cited by 12 publications

References 50 publications

A Study of the Magnetic Properties and Structure of Heusler Alloys Prepared by Arc-Melting Technique

A Study of the Magnetic Properties and Structure of Heusler Alloys Prepared by Arc-Melting Technique

Half‐Metallicity in Ni2XMn Heusler Alloys (X = Fe, Co, Cr): Ab Initio Calculations

Graphene‐Based Magnetocaloric Composites for Energy Conversion

Contact Info

Product

Resources

About

Half‐Metallicity in Ni₂XMn Heusler Alloys (X = Fe, Co, Cr): Ab Initio Calculations